Evolution of sex: Why do organisms shuffle their genotypes

de ual species, the extent of genetic mixing caused by sex Genetic associations are conventionally defined is reduced by the complete suppression of recombina-tion in some individuals; for example, there is no re-combination in male Drosophila melanogaster. These observations suggest that reproduction with less or no genetic mixing is possible. Nonetheless, some such that positive values indicate alleles are packaged into individuals in such a way that increases the allelic variance among individuals, whereas negative values indicate alleles are organized in such a way that de-creases the allelic variance among individuals (Box 1 and figure in Box 2). Characterizing a population by its allele frequencies and patterns of associations makes it simpler to understand how genetic mixing affect